Suggestions for new design Aluminum Mopar SB clean slate (kind of) cylinder heads

Thinking about magnum vs LA exhaust ports and header availability. Here are some pictures with a felpro 1413 gasket representing the LA port and a cometic gasket I had made representing the magnum port. gaskets are placed on...
(1) stock LA port
(2) EQ magnum port
(3) Speedmaster LA head
(4) stock magnum head
The same header is used on all them, even though the ports are slightly different.